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Pete Erich Posted on Aug 07, 2017

My Yamaha TTR50 dirt bike won't turn over

I installed new plug and Battery. I drained out old gas and still have trouble getting it to turn over

5 Related Answers

Anonymous

  • 431 Answers
  • Posted on May 12, 2009

SOURCE: 1992 kawasaki Vulcan 750 stops running

Sounds like what you realy need to do is remove the carb jets and give them a good clean , this if I am right is the twin V 8 valve engine with twin Klhein carbs , make sure also your air filter is not dirty and check tank fuel filter ,, other than that you may be intrested in the manuel obtainable from this site
http://www.haynes.com/products/sfID1/8/sfID2/9/sfID3/81/productID/399
hope this helps good luck .. and Live long and prosper lol .. Regards Vortash

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Greg O'Day

  • 376 Answers
  • Posted on Oct 01, 2009

SOURCE: 1981 Yamaha XJ750 Seca Trouble Starting it

Battery conections need to be checked even the ground wire.

tombones

  • 3567 Answers
  • Posted on Dec 21, 2009

SOURCE: Purchased a Yamaha 2003 TTR 225 on Saturday and it

Check the spark plug to see if is sparking. Hold the metal threads against the metal cylinder and have a friend kick the engine over. If no spark, use an ohmmeter to check the kill switch on the bars and also the side-stand kill switch if your bike has one. Check the wires for a loose connection or disconnected wire.

mso
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  • The choke, used when the engine is cold. Pull the red knob for choke.
  • The " Hot Start " Lever, used when the engine is hot. Pull the lever to lean the fuel mix when the engine has been running.
  • The de-compression lever, always used.
  • the throttle, used to prime the cylinder, (power valve).
Don't kick, instead, push the kick lever downward. You will feel the back pressure as the piston is going upward on the compression stroke to the point the pressure is great enough that the kick lever "locks up". You are very close to TDC. NOW, pull in the de-compression lever. push the kick lever a little bit more to get the piston past TDC. Now release the de-compression lever. Give the throttle a 1/4 turn then let it snap closed. A diaphragm, (Power valve), in the carb gives a shot of gas when this is done. DO NOT do this multiple times because you will flood the engine. Leave the throttle closed when kicking. A flooded engine will often backfire. Now give a strong kick through the full sweep of the kick start lever. Quickly get your foot off the kick lever at the end of the kick to avoid any chance of "kickback" from the kick lever. This happens in the case of a misfire, aka > backfire. It can be very painful, and can even break a leg. I am serious about that. Repeat the process (but without the throttle priming), for six kicks. After six kicks go ahead and twist the throttle again for a second priming. A good battery, a clean spark plug, a clean carb and clean air filter will also aid in starting. Note that not all carbs have a power valve. When a power valve is not present you should crack the throttle open only 1/8 inch from closed on each kick. Please take a moment and rate my answer. Thanks!


Anonymous

  • 2 Answers
  • Posted on Apr 18, 2010

SOURCE: my dirt bike wont start, it has spark on the spark

it might be a piston in the engine it could of blowed up and there is no compreshion.

Anonymous

  • 5 Answers
  • Posted on Sep 05, 2012

SOURCE: ive got 2006 yamaha xt125x my display screen is

i getting code on digital display endr atrd rd

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Remove the water trap bowl at the bottom of the petcock, (gas valve). Is there any water or trash in the bowl? Drain a cup of gas from the tank. Is there any water or trash in the cup? Dump it, clean it and re-mount it, ( not all bikes have a water trap bowl ).

Drain the carburetor. There may be a screw on the lower side of the carb float bowl. Remove the screw then replace it after the fuel drains. Turn the gas back on and wait a minute for the carb to fill with gas. Install a new stock NGK spark plug and try to start the engine. If the bike doesn't start and run properly then shut off the gas and remove the carburetor from the engine.

Remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray into all the little airways and fittings in the carb. Remove the idle screw and the air screw on the outside throat of the
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Be sure to put these two screws back in the same hole they came out of. IMPORTANT > do not tighten these two screws down. Only screw these in until they LIGHTLY seat. Now turn each screw one and one half turns outward. Put the rest of the
carb back together, clean the air filter and install the carb. Let the float bowl fill then start the engine. This process should get you back on the road.

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Help with getting Yamaha 1981 Special running after winter.

Drain the old gas out of the tank to start with. Remove the water trap bowl at the bottom of the petcock, (gas valve). Any water or trash in the bowl? Dump it, clean it and re-mount it, ( not all bikes have a water trap bowl ).

Drain the carburetor. There should be a screw on the lower side of the carb float bowl. Remove the screw then replace it after the fuel drains. Turn the gas back on and wait a minute for the carb to fill with gas. Install a new stock NGK spark plug and try to start the engine. If the bike doesn't start and run properly then shut off the gas and remove the carburetor from the engine.

Remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray into all the little airways and fittings in the carb. Remove the two screws on the outside throat of the carb and spray into the screw holes as well.
< < READ CLOSELY > >
Be sure to put these two screws back in the same hole they came out of. IMPORTANT > do not tighten these two screws down. Only screw these in until they LIGHTLY seat. Now turn each screw one and one half turns outward. Put the rest of the carb back together, clean the air filter and install the carb. Be sure the bolts are tight. INSTALL AN IN-LINE FUEL FILTER. Let the float bowl fill then start the engine. Set the idle speed with the idle screw. This process should get you back on the road.


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